کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5017566 1466715 2018 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of process duration on the microstructures of fast multiple rotation rolling-induced nanocrystalline layer and its wear properties
ترجمه فارسی عنوان
اثر طول مدت فرایند بر ریزساختار لایه نانو کریستالین ناشی از چرخش سریع چند چرخشی و خواص سایش آن
کلمات کلیدی
نانوکریستالیزاسیون سطح خود، چرخش سریع چند چرخشی، تیتانیوم، میکرو سختی، ضریب اصطکاک،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
A nano-structured surface layer was prepared on the top surface of commercially pure titanium by fast multiple rotation rolling(FMRR) technique for the first time. X-ray diffraction (XRD), field emission scanning electron microscopy(FE-SEM), transmission electron microscopy(TEM), optical microscopy(OM), as well as Vickers test and wear test were used to characterize the microstructural evolution and mechanical properties of the nano-structured layer. The results indicated that when the treatment lasts for 60 min, the average grain size reduces to as small as 50 nm, and high-density mechanical twining was observed in deformed grains. Moreover, the surface modification resulted in an approximately two-fold increase in microhardness of the nano-structured surface layer and remarkable enhancement in wear resistance. The hardness reached up to 280HV0.05, and friction coefficient declined from 1.1 to 0.6 at sliding velocity of ∼0.1 m/s. The obtained results revealed that mechanical twining took precedence in the plastic deformation, and twining and dislocation interaction were induced in the refined nano-structured layer on the surface by FMRR.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Processing Technology - Volume 252, February 2018, Pages 159-166
نویسندگان
, , ,